Armature winder



Dec. 26, 1950 L. D. MOCOLLQM 2,535,438

ARMATURE WINDER Filed Dec. 5, 1947 2 Sheets-Sheet 2 WWW A 1/0 way:

Patented Dec. 26, 1950 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates to a tool or implement especially adapted for usefor either manually winding or holding electric motor armatures andwhich materially reduces the amount of time and manual labor as well asthe eye strain ordinarily required in the winding of small armatures.

More particularly, it is an object of the invention to provide a tool orimplement of extremely simple construction capable of being readilyengaged with circumferentially spaced slots of an armature and by meansof which the armature may be readily revolved.

. Still another object of the invention is to pro vide an armaturewinder having resiliently disposed jaws for engagement with spaced slotsof the armature core and having means for preventing disengagement ofthe jaws from the core slots while the armature is being revolved by thetool or implement.

Various other objects and advantages of the invention will here nafterbecome more fully apparent from the following description of thedrawings, illustrating a preferred embodiment thereof, and wherein:

Figure 1 is a side elevational view of the winding tool or implementshown in an applied position;

Figure 2 is a top plan view thereof;

Figure 3 is an enlarged longitudinal sectional view taken substantiallyalong a plane as indicated by the line 3-3 of Figure 2;

Figure 4 is a transverse sectional view taken substantially along aplane as indicated by the line 4-4 of Figure 3;

Figure 5 is a cross sectional view taken substantially along a plane asindicated by the line 55 of Figure l, and

Figure 6 is a fragmentary longitudinal sectional view takensubstantially along a plane as indicated by the line 6-6 of Figure 4 andshowing one of the jaws of the tool or implement in an applied position.

Referring more specifically to the drawings, for the purpose ofillustrating a preferred application and use of the winding implement ortool, desig nated generally I, an armature core is illustrated in Figure1 and fragmentarily in Figure 6, designated generally 8, and is providedwith the usual straight slots 9 certain of which are shown in Figure 1provided with lining strips l0, certain of which are shown containingthe windings II which extend through the slots 9 thereof.

The winding tool or implement 1 comprises an elongated strip ofrelatively resilient metal, designated generally I2, and which includesan arcuate outwardly bowed intermediate portion I3 having correspondinginturned ends [4 forming jaws and which are disposed at acute angles tothe portion I3 and in inwardly converging rela-. tionship relatively toone another. As best seen in Figure 3, the inner, free ends of the jawsH are turned inwardly or upwardly to form the lips l5 which are adaptedto engage in selective slots 9, inwardly of the restricted outer portionthereof, as clearly illustrated in Figures 1 and 6.

An elongated leaf type spring I6 is secured by a rivet or suitablefastening l'l, intermediate of its ends to the outer side of theintermediate portion I3 and intermediate of the ends thereof, so thatportions of the spring [6 on either side of the rivet ll will be bowedoutwardly relatively to the intermediate portion [3 and with theterminals thereof bearing against said intermediate portion l3, adjacentits ends, for urging the jaws l4 inwardly of one another.

An elongated strip of metal [8 includes an intermediate portion which isdisposed in the inner side of the arcuate strip portion l3 and which maybe secured thereto by the rivet I1. The

-' portion I8 is rovided at its ends with obliquely arcuate portion 13and the jaws l4 and which terminate in obliquely projecting legs 20which are disposed on the inner sides of the jaws l4 and which extendtoward the free ends thereof in diverging relationship thereto. Theterminals of the legs 20 are turned inwardly and back on themselves toform feet 2! which are adapted to bear against portions of the peripheryof the armature 3 when the lips [5 are in engagement with selectiveslots 9 thereof, as illustrated in Figures 1 and 6. The strip i8 ispreferably secured at the junctures of its portions 19 and 20 bysoldering or welding, as seen at 22, to the inner sides of the jaws I 4.As best illustrated in Figure 4, the side edges of the jaws M are foldedinwardly upon themselves, as seen at 23, from adjacent the ends of thearcuate intermediate portion l3 to points adjacent the lips l5 and saidfolded side edges converge toward the free ends of the jaws I 4. Theside edges of the arcuate intermediate portion l3 are recessedintermediate of their ends, as seen at 24 in Figure 2, to form a handleor grip portion by means of which the tool or implement 1 can bemanually engaged, when in its applied position of Figure 1, for turningthe armature 8 or to hold armature 8 while wire is laid in by a rotarymotion of the arm.

When the implement l is applied as illustrated in Figure 1, theresiliency of the intermediate 3 portion 13 or said portion l3 plus thespring IE will tend to cause the ends of the portion l3 to springinwardly for urging the jaws l4 inwardly and toward one another toretain the lips I5 thereof in engaged position in the selective slots 9and within the Winding strips In thereof, one end of each of whichextends upwardly on the inner side of each jaw. The foot members 2|, aspreviously stated, will be disposed against portions of the periphery ofthe armature 8 when the lips l5 are in engagement with the slots 9 toprevent said lips l5 from springing out of the slots when a torsionalforce is exerted on the tool or implement 1 for revolving the armature8. It will thus be readily apparent that by manually engaging therecessed portions 24 the implement 1 can be revolved for rotating thearmature 8 therewith for effecting the winding thereof. By manuallygrasping the jaws l4 and spreading them relatively to one another, saidjaws can be readily disengaged from or engaged with selective slots 9.

Obviously, if strip 12 is sufficiently resilient the auxiliary spring itmay be dispensed with and the intermediate arcuate portion of the stripl8 and the oblique portions l9 thereof could likewise be omitted ifdesired, without affecting the functioning of the tool or implement 1.

Various modifications and changes, in addition to those previouslymentioned, are likewise contemplated and may obviously be resorted to,without departing from the spirit or scope of the invention ashereinafter defined by the appended claims.

I claim as my invention:

1. In a tool or implement for winding armatures, an elongated strip ofresilient material having an arcuate. outwardly bowed intermediateportion and inturned substantially straight ends forming jaws disposedin inwardly converging relationship, said jaws being resilientlysupported relatvely to one another by said resilient intermediateportion and the inner terminals thereof being adapted to extend into andengage selective slots of an armature for attaching the tool orimplement thereto so that the armature can be revolved and wound bytorsional force exerted on the tool or implement, and leg membersdisposed on the inner sides of the jaws in outwardly divergingrelationship relatively thereto and having foot portions at their freeends adapted to engage portions of the periphery of the armature whenthe jaws are disposed for engagement with the selective slots thereof,said leg members extending longitudinally of the jaws and the footportions thereof being spaced a greater distance apart than the jawterminals.

2. In a tool or implement for winding armatures. an elongated strip ofresilient material hav- 4 ing an arcuate, outwardly bowed intermediateportion and inturned substantially straight ends forming jaws disposedin inwardly converging relationship, said jaws being resilientlysupported relatively to one another by said resilient intermediateportion and the inner terminals thereof being adapted to extend into andengage selective slots of an armature for attaching the tool orimplement thereto so that the armature can be revolved and wound bytorsional force exerted on the tool or implement, said jaws havinginwardly turned free ends forming lips adapted to engage in saidselective slots for detachably retaining the jaws in engagement with thearmature, and leg members disposed on the inner sides of the jaws inoutwardly diverging relationship relatively thereto and having footportions at their free ends adapted to engage portions of the peripheryof the armature when the jaws are disposed for engagement with theselective slots thereof, said leg members extending longitudinally ofthe jaws and the foot portions thereof being spaced a greater distanceapart than the jaw terminals.

3. In a tool or implement for winding armatures. an elongated strip fresilient material having an arcuate, outwardly bowed intermediateportion and inturned substantially straight ends forming jaws disposedin inwardly converging relationship, said jaws being resilientlysupported relatively to one another b said resilient intermediateportion and the inner terminals thereof being adapted to extend into andengage selective slots of an armature for attaching the tool orimplement thereto so that the armature can be revolved and wound bytorsional force exerted on the tool or implement, and a leaf springsecured intermediate of its ends to the outer side of said arcuateintermediate portion and intermediate of the ends thereof, said leafspring having terminals bearing against the outer side of Said arouateintermediate portion and adjacent its ends for urging the ends of thearcuate intermediate portion inwardly of one another.

LORAN D. McCOLLOM.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Num er Name Date 1,371,647 Sandell Mar. 15, 19212,394,529 Arpurth Feb. 12, 1946 FOREIGN PATENTS Number Country Date223,270 Germany June 18, 1910

